LM4935 datasheet(41/112 Pages) NSC

tên linh kiện	LM4935

Giải thích chi tiết về linh kiện	Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC

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12.0 Status & Control Registers (Continued)

12.20 AUX_LEFT CONFIGURATION REGISTER

This register is used to control the left aux analog input.

TABLE 21. AUX_LEFT (0x0Fh)

Bits

Field

Description

4:0

AUX_

LEFT_

LEVEL

Programs the gain/attenuation applied to the AUX LEFT analog input to the mixer. (Note 21)

AUX_LEFT_LEVEL

Level (With Boost)

Level (Without Boost)

00000

−34.5 dB

−46.5 dB

00001

−33 dB

−45 dB

00010

−31.5 dB

−43.5 dB

00011

−30 dB

−42 dB

00100 to 11100

−28.5 dB to +7.5 dB

−40.5 dB to −4.5 dB

11101

+9 dB

−3 dB

11110

+10.5 dB

−1.5 dB

11111

+12 dB

0 dB

AUX_

LEFT_

BOOST

If set the gain of the AUX_LEFT input to the mixer is increased by 12 dB (see above).

AUX_L_MUTE

If set the AUX LEFT input is muted.

AUX_OR_DAC_L

If set the AUX LEFT input is passed to the mixer, the default is for the DAC LEFT output to be

passed to the mixer.

Note 21: The recommended mixer level is 1V RMS. The auxiliary analog inputs can be boosted by 12 dB if enough headroom is available. Clipping may occur if

the analog power supply is insufficient to cater for the required gain.

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